Datasheet

5

002-34772 Rev. *F

2023-06-13

EZ-PD™ PAG2P primary-side startup controller

Application overview

2

Application overview

EZ-PD™ PAG2P works with Infineon’s secondary side controller PAG2S. Figure 2 shows the application diagram

of a USB Power Delivery adapter solution with ‘EZ-PD™ PAG2P + EZ-PD™ PAG2S’. In this system, once the start-up

phase is complete, the primary FET control is completely synchronized to the PWM pulses received from the

secondary side. The PWM pulses are transmitted over an isolation barrier using a PET. EZ-PD™ PAG2P takes over

control of the primary FET only during power-up and system fault scenarios.

Figure 2

Type-C based mobile phone power adapter with EZ-PD™ PAG2P and EZ-PD™ PAG2S in a

secondary controlled flyback topology configuration

Figure shows the application diagram for power adapter where PAG2P is powered directly from the AC mains

before the full bridge rectifier. This topology enables discharging the X-cap using PAG2P instead of using a passive

resistor with an added high side FET running in non-complementary half bridge mode. This is also known as ACF

topology. The added high-side FET provides an advantage of recycling the leakage energy to the input thereby

improving efficiency wherein traditional flyback the leakage energy would be dissipated in the snubber.

Figure 3

Type-C based power adapter with EZ-PD™ PAG2P with in X-cap discharge mode an ACF

configuration

EZ-PD™

PAG2P

Secondary side

Primary side

EMI

filter

Full-bridge

rectifier

Snubber

HV

GDL

CS

PULSEIN

RT

SS

CC1

CC2

DP_GPIO

DM_GPIO

VBUS_TypeC

EZ-PD™ PAG2S

PWM_DRV_GPIO1

VBUS_IN

Temperature

Sensor

GPIO

CC_COMP_GPIO2

EA_OUT

FB

BGND

BSW

Secondary side

Primary side

EMI

filter

Full-bridge

rectifier

HV

VCC

CC1

CC2

DP_GPIO

DM_GPIO

VBUS_TypeC

EZ-PD™ PAG2S

PWM_DRV_GPIO1

VBUS_IN

Temperature

sensor

GPIO

CC_COMP_GPIO2

EA_OUT

FB

RT

EZ-PD™

PAG2P

PULSEIN

SS

GD

driver

GDH

VCC

GD

Vbst

SW